Section 7,2- engine dc control system, Problem 4- engine starts hard and runs rough – Generac Power Systems NP-40G User Manual
Page 106
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
Section 7,2- ENGINE DC CONTROL SYSTEM
Problem
4-
Engine Starts Hard and Runs Rough
TEST 15-CHECK
S P A R K .
TEST 16-CHECK
TEST 23- CHECK
NO
IGNITION SPARK
(with Spark Tester)
"" GOOD ^
SPARK PLUG
« GOOD^
CARBURETION
CHANGE
ENGINE MISS IS
APPARENT
SPARK PLUG BAD
ENGINE RUNS O.K. NOW
I
TEST 17-CHECK
IGNITION POWER
SUPPLY (WIRE 14)
i
iGOOD
1
CLEAN & REGAP
OR REPLACE
SPARK PLUG
STOP TESTS
INTERMITTENT
POWER SUPPLY
I
TEST 21-CHECK
ENGINE
CONTROLLER
BOARD OUTPUT
TO WIRE 14
BAD
TEST 18-CHECK
IGNITION
SENSOR
BAD
REPLACE
SENSOR
TEST 19- CHECK
IHMITinM
COIL
BAD
♦
REPLACE COIL
f
REPAIR, RECONNECT
OR REPLACE BAD
TEST 20- TEST
WIRE(S) 14
AS REQUIRED
IGNITION MODULE
REPLACE ENGINE
^ CONTROLLER
CIRCUIT BOARD
I
BAD
1
REPLACE MODULE
TEST 22- TEST
TEST 24- CHECK
AUTOMATIC CHOKE — GOOD ►
ENGINE
BAD
i
ADJUST, REPAIR OR
REPLACE AS NECESSARY
REPAIR OR REPLACE
ENGINE AS NECESSARY
GOOD
Page 7.2-4